To be honest, I am curious about the sequence of the story now. Based on the game's information, no matter which ends you choose, her ends are all doom. As I said previously, I got the feeling the author splits up the story ending to make up four different endings. But we know that due to her mana situation, she does not have a very long life left, no matter which end we choose.
End A: This could be considered a happy end, and since her desperation clinging to her mana, I don't think she will give up on it to live a little longer.
End B: This is a short version of either end C or D, so leave it alone.
End C: Well, they use the tome for sex without care, so sooner or later, the curse will show up around there. The guild is going to jump in, and we are talking about the mage guild that dealt with all these shit years, including they have the whole library now, so I think they have their way to counter those spell or detect it—image Cero's face when he knows his sealing memories of himself and the people around him. Talking about a girl who always thinks about duty now got an IQ drop to the point of not understanding why Cero worked hard for her old value.
End D: Well, the shit shows in this one will be earlier. Not only was she a higher-up in the guild, but she also belonged to a famous family; her sleeping around with a stupid dude becoming a laughing story for the whole town is going to a good reputation story. So, no surprise when they jump in, and pretty sure they will find out. And this time, Cero is not around to cover her ass anymore.
In both ends, C and D, I'm curious how Buzz takes care of her like he always claims when shit comes down hard. Buzy, protect me (LOL) skill acquired. Cero can watch over his lover even if he is not saying anything, I doubt the other party can do that since just a few spells, and he already pisses his pants. I'm pretty sure Cero is not a fan of ntr when he "cut string" with her right on the spot at the end of D, but maybe he could do something to save her behind the screen. The development mocks the stupid cheating couple in all skills descriptions too.